Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A method for Sounding Reference Signal (SRS) transmission, comprising: receiving, by User Equipment (UE), high-layer signaling, wherein the high-layer signaling is used for setting at least one SRS parameter configuration respectively for each of a plurality of uplink BWPs of the UE; determining, by the UE, an active uplink Bandwidth Part (BWP) among the plurality of uplink BWPs; determining, by the UE, an SRS parameter configuration corresponding to the active uplink BWP according to the high-layer signaling, wherein the SRS parameter configuration corresponding to the active uplink BWP comprises a configuration of at least one SRS resource set in the active uplink BWP and a configuration of at least one SRS resource in the active uplink BWP; and transmitting, by the UE, an SRS in the active uplink BWP according to the SRS parameter configuration.
This invention relates to wireless communication systems, specifically to methods for transmitting Sounding Reference Signals (SRS) in a User Equipment (UE) operating with multiple uplink Bandwidth Parts (BWPs). The problem addressed is the efficient configuration and transmission of SRS across different uplink BWPs, ensuring proper resource allocation and signal quality for uplink channel state information. The method involves receiving high-layer signaling that sets SRS parameter configurations for each of the UE's uplink BWPs. These configurations include details for SRS resource sets and individual SRS resources within each BWP. The UE determines the currently active uplink BWP and retrieves the corresponding SRS parameter configuration from the high-layer signaling. This configuration specifies how SRS resources are allocated within the active BWP, including the number and type of SRS resources. The UE then transmits the SRS in the active BWP according to the retrieved configuration, ensuring proper uplink channel estimation and feedback to the network. This approach allows dynamic adaptation of SRS transmission based on the active BWP, optimizing resource usage and maintaining reliable uplink communication. The method ensures that SRS configurations are properly aligned with the current operating BWP, avoiding misconfigurations and improving overall system performance.
2. The method of claim 1 , wherein determining, by the UE, the active uplink BWP comprises: determining, by the UE, the active uplink BWP according to BWP indication information, wherein latest received Downlink Control Information (DCI) for scheduling uplink transmission comprises the BWP indication information.
A method for managing bandwidth parts (BWPs) in wireless communication systems addresses the challenge of efficiently allocating and activating uplink BWPs in user equipment (UE) to optimize resource utilization and reduce signaling overhead. The method involves determining an active uplink BWP based on BWP indication information received in downlink control information (DCI) used for scheduling uplink transmissions. The UE evaluates the latest received DCI to identify the BWP indication information, which specifies the active uplink BWP. This approach ensures dynamic and flexible BWP switching, allowing the UE to adapt to varying network conditions and traffic demands. By leveraging DCI for BWP activation, the method minimizes the need for additional signaling, improving efficiency and reducing latency in uplink communications. The solution is particularly relevant in 5G and beyond networks, where BWP management is critical for supporting diverse service requirements and enhancing spectral efficiency. The method ensures seamless BWP transitions while maintaining low overhead, making it suitable for high-mobility and high-data-rate applications.
3. The method of claim 1 , wherein the configuration of the at least one SRS resource set comprises at least one of a power control parameter configuration of the at least one SRS resource set, a usage configuration of the at least one SRS resource set, an aperiodic triggering state corresponding to the at least one SRS resource set, or a Channel State Information Reference Signal (CSI-RS) configuration associated with the at least one SRS resource set.
This invention relates to wireless communication systems, specifically to the configuration and management of Sounding Reference Signal (SRS) resource sets in wireless networks. The problem addressed is the need for flexible and efficient configuration of SRS resources to optimize uplink channel state information (CSI) acquisition, power control, and aperiodic triggering in wireless communication systems. The invention describes a method for configuring at least one SRS resource set, where the configuration includes one or more of the following parameters: a power control parameter to adjust transmission power for the SRS resource set, a usage configuration to define the purpose of the SRS resource set (e.g., for beam management, CSI acquisition, or other uses), an aperiodic triggering state to enable dynamic triggering of SRS transmissions, and a Channel State Information Reference Signal (CSI-RS) configuration to associate the SRS resource set with specific CSI-RS resources for downlink channel estimation. By allowing customization of these parameters, the invention enables more precise control over SRS transmissions, improving the accuracy of uplink channel measurements and reducing unnecessary signaling overhead. This configuration flexibility supports advanced features such as beamforming, multi-user MIMO, and adaptive power control in wireless networks. The method ensures efficient resource utilization while maintaining reliable channel state information for optimal communication performance.
4. The method of claim 3 , wherein the SRS parameter configuration comprises the power control parameter configuration of the at least one SRS resource set; and transmitting, by the UE, the SRS in the active uplink BWP according to the SRS parameter configuration comprises: determining, by the UE, transmit power for SRS transmission on the at least one SRS resource set according to the power control parameter configuration of the at least one SRS resource set; and transmitting the SRS in the active uplink BWP according to the determined transmit power.
This invention relates to wireless communication systems, specifically to methods for configuring and transmitting sounding reference signals (SRS) in a user equipment (UE) operating within an active uplink bandwidth part (BWP). The problem addressed is the efficient and accurate transmission of SRS signals, which are used for channel state information (CSI) estimation and uplink beam management, while ensuring proper power control to optimize signal quality and resource utilization. The method involves configuring SRS parameters for at least one SRS resource set, including power control parameters. The UE determines the transmit power for SRS transmission based on these power control parameters and then transmits the SRS in the active uplink BWP according to the determined power level. This ensures that the SRS signals are transmitted with appropriate power, enhancing reliability and efficiency in uplink communications. The power control parameters may include settings such as power control adjustments, reference signal power levels, or other configurations that influence the transmit power of the SRS. By dynamically adjusting the transmit power based on these parameters, the UE can adapt to varying channel conditions and interference levels, improving overall system performance. This method is particularly useful in scenarios where multiple SRS resource sets are active, requiring precise power control to avoid interference and ensure accurate channel estimation.
5. The method of claim 3 , wherein the SRS parameter configuration comprises the usage configuration of the at least one SRS resource set; and transmitting, by the UE, the SRS in the active uplink BWP according to the SRS parameter configuration comprises: determining, by the UE, an antenna port, a transmission beam or an SRS resource number for SRS transmission on the at least one SRS resource set according to the usage configuration of the at least one SRS resource set, and transmitting the SRS in the active uplink BWP according to the determined antenna port, transmission beam or SRS resource number.
This invention relates to wireless communication systems, specifically to methods for configuring and transmitting Sounding Reference Signals (SRS) in a User Equipment (UE) operating within an active uplink Bandwidth Part (BWP). The problem addressed is the efficient and flexible configuration of SRS resources to support various use cases, such as beam management, channel state information acquisition, and uplink transmission scheduling. The method involves configuring SRS parameters for a UE, including the usage configuration of at least one SRS resource set. The usage configuration specifies how the UE should determine the antenna port, transmission beam, or SRS resource number for transmitting SRS in the active uplink BWP. Based on this configuration, the UE selects the appropriate antenna port, beam, or resource number and transmits the SRS accordingly. This allows the network to dynamically adapt SRS transmission to different operational requirements, improving resource utilization and performance in wireless communication systems. The approach ensures that SRS transmissions are optimized for the current BWP and usage scenario, enhancing overall system efficiency.
6. The method of claim 3 , wherein the SRS parameter configuration comprises the aperiodic triggering state corresponding to the at least one SRS resource set; and transmitting, by the UE, the SRS in the active uplink BWP according to the SRS parameter configuration comprises: determining, by the UE, an SRS resource set for aperiodic SRS transmission in the active uplink BWP according to the aperiodic triggering state corresponding to the at least one SRS resource set and the aperiodic SRS triggering signaling, and transmitting the SRS in the active uplink BWP according to the determined SRS resource set.
This invention relates to wireless communication systems, specifically to methods for configuring and transmitting aperiodic Sounding Reference Signals (SRS) in a User Equipment (UE) operating within an active uplink Bandwidth Part (BWP). The problem addressed is the efficient and flexible transmission of SRS in dynamic wireless environments, where the UE must adapt to varying network conditions and resource allocations. The method involves configuring SRS parameters for aperiodic triggering, where the configuration includes an aperiodic triggering state linked to at least one SRS resource set. The UE receives this configuration and, upon detecting aperiodic SRS triggering signaling, determines the appropriate SRS resource set for transmission within the active uplink BWP. The determination is based on the aperiodic triggering state and the received signaling. Once the SRS resource set is identified, the UE transmits the SRS according to the parameters defined in that set, ensuring proper synchronization and resource utilization in the uplink communication. This approach allows the network to dynamically control SRS transmissions, optimizing uplink channel state information feedback while minimizing unnecessary signaling overhead. The method ensures that the UE can quickly adapt to changes in network demands, improving overall system efficiency and reliability. The solution is particularly relevant in scenarios where flexible resource allocation and low-latency communication are critical, such as in 5G and beyond networks.
7. The method of claim 3 , wherein the SRS parameter configuration comprises the CSI-RS resource configuration associated with the at least one SRS resource set; and transmitting, by the UE, the SRS in the active uplink BWP according to the SRS parameter configuration comprises: determining, by the UE, at least one of a beam or a precoding matrix for SRS transmission on the at least one SRS resource set according to the CSI-RS resource configuration associated with the at least one SRS resource set, and transmitting the SRS in the active uplink BWP according to the determined at least one of beam or precoding matrix.
This invention relates to wireless communication systems, specifically improving sounding reference signal (SRS) transmission in a user equipment (UE) operating in an active uplink bandwidth part (BWP). The problem addressed is optimizing SRS transmission by dynamically configuring SRS parameters based on channel state information reference signal (CSI-RS) resources, ensuring efficient beam selection and precoding for uplink transmissions. The method involves configuring SRS parameters, including associating CSI-RS resource configurations with at least one SRS resource set. The UE then determines at least one of a beam or a precoding matrix for SRS transmission on the SRS resource set based on the associated CSI-RS resource configuration. Using this determination, the UE transmits the SRS in the active uplink BWP according to the selected beam or precoding matrix. This approach leverages downlink CSI-RS measurements to enhance uplink SRS performance, improving beamforming accuracy and reducing signaling overhead. The CSI-RS resource configuration provides the necessary reference for the UE to align its uplink transmission characteristics with downlink channel conditions, ensuring optimal beam selection and precoding. This method is particularly useful in scenarios where dynamic beam adaptation is required, such as in millimeter-wave communications or high-mobility environments. The invention enhances spectral efficiency and reliability in wireless communication systems by dynamically adapting SRS transmission parameters based on downlink channel state information.
8. The method of claim 1 , wherein the configuration of the at least one SRS resource comprises at least one of a time-frequency resource configuration of the at least one SRS resource, a sequence configuration of the at least one SRS resource, an antenna port configuration of the at least one SRS resource, a periodicity configuration of the at least one SRS resource, a spatial relation configuration of the at least one SRS resource, or an aperiodic triggering state corresponding to the at least one SRS resource.
This invention relates to wireless communication systems, specifically to the configuration and management of Sounding Reference Signal (SRS) resources in cellular networks. The problem addressed is the need for flexible and efficient SRS resource allocation to support various use cases, such as beam management, channel state information acquisition, and uplink transmission optimization. The invention describes a method for configuring SRS resources in a wireless communication system. The configuration includes defining at least one SRS resource with specific parameters to optimize signal transmission and reception. These parameters include the time-frequency resource allocation, which specifies the time slots and frequency bands used for SRS transmission. The sequence configuration determines the specific reference signal sequence used, ensuring proper signal identification and measurement. The antenna port configuration defines which antenna ports are utilized for SRS transmission, enabling spatial diversity and beamforming. The periodicity configuration sets how often the SRS is transmitted, balancing between overhead and channel tracking accuracy. The spatial relation configuration establishes the relationship between the SRS and other reference signals or beams, ensuring proper alignment and coordination. Additionally, an aperiodic triggering state allows for on-demand SRS transmission when needed, providing flexibility in dynamic scenarios. This method enhances the efficiency and adaptability of SRS resource management, improving overall system performance in wireless communication networks.
9. The method of claim 8 , wherein the SRS parameter configuration comprises a spatial relation parameter of the at least one SRS resource; and transmitting, by the UE, the SRS in the active uplink BWP according to the SRS parameter configuration comprises: determining, by the UE, a target SRS resource, a CSI-RS resource or a Synchronization Signal Block (SSB) spatially correlated with the at least one SRS resource according to the spatial relation parameter of the at least one SRS resource; determining, by the UE, a transmission beam of the at least one SRS resource according to the target SRS resource, the CSI-RS resource or the SSB; and transmitting, by the UE, the SRS in the active uplink BWP according to the determined transmission beam.
This invention relates to wireless communication systems, specifically improving the transmission of Sounding Reference Signals (SRS) in a user equipment (UE) operating in an active uplink Bandwidth Part (BWP). The problem addressed is ensuring accurate beam alignment for SRS transmissions when the UE switches between different BWPs, which can disrupt spatial correlation and degrade communication quality. The method involves configuring SRS parameters for at least one SRS resource, including a spatial relation parameter that defines the spatial correlation between the SRS resource and a reference signal, such as a CSI-RS resource or a Synchronization Signal Block (SSB). The UE determines a target SRS resource, CSI-RS resource, or SSB that is spatially correlated with the SRS resource based on the spatial relation parameter. Using this reference, the UE then determines the appropriate transmission beam for the SRS resource. Finally, the UE transmits the SRS in the active uplink BWP using the determined transmission beam, ensuring proper beam alignment even after BWP switching. This approach enhances SRS transmission reliability by maintaining spatial correlation across BWP changes, improving uplink communication performance in dynamic wireless environments.
10. The method of claim 8 , wherein the SRS parameter configuration comprises the sequence configuration of the at least one SRS resource; and transmitting, by the UE, the SRS in the active uplink BWP according to the SRS parameter configuration comprises: determining, by the UE, an SRS sequence for SRS transmission on the at least one SRS resource according to the sequence configuration of the at least one SRS resource, and transmitting the SRS in the active uplink BWP according to the determined SRS sequence.
This invention relates to wireless communication systems, specifically to methods for configuring and transmitting Sounding Reference Signals (SRS) in a User Equipment (UE) operating within an active uplink Bandwidth Part (BWP). The problem addressed is the efficient and accurate transmission of SRS, which are used for channel state information (CSI) estimation and uplink beam management, while ensuring proper sequence configuration and resource allocation within the active uplink BWP. The method involves configuring SRS parameters, including the sequence configuration for at least one SRS resource. The UE determines an SRS sequence for transmission on the at least one SRS resource based on the provided sequence configuration. The UE then transmits the SRS in the active uplink BWP according to the determined sequence. This ensures that the SRS transmission aligns with the configured parameters, optimizing channel estimation and beam management in the wireless communication system. The sequence configuration may include details such as the type of sequence, length, and other parameters necessary for generating the SRS waveform. The UE's ability to dynamically determine the SRS sequence based on the configuration allows for flexible and efficient SRS transmission, adapting to varying channel conditions and system requirements. This method enhances the reliability and accuracy of uplink communications in wireless networks.
11. The method of claim 8 , wherein the SRS parameter configuration comprises the periodicity configuration of the at least one SRS resource; and transmitting, by the UE, the SRS in the active uplink BWP according to the SRS parameter configuration comprises: determining, by the UE, a periodicity operation for SRS transmission on the at least one SRS resource according to the periodicity configuration of the at least one SRS resource, and transmitting the SRS in the active uplink BWP according to the determined periodicity operation.
In wireless communication systems, particularly in 5G and beyond, efficient uplink channel sounding is critical for maintaining link quality and optimizing resource allocation. A key challenge is dynamically configuring and transmitting Sounding Reference Signals (SRS) across different uplink Bandwidth Parts (BWPs) while ensuring minimal overhead and synchronization with network requirements. Existing solutions often lack flexibility in adapting SRS transmission periodicity to varying network conditions or UE capabilities. This invention addresses the problem by providing a method for configuring and transmitting SRS in an active uplink BWP of a user equipment (UE). The method involves configuring SRS parameters, including the periodicity of SRS resources, and transmitting the SRS according to the configured periodicity. The UE determines the periodicity operation for SRS transmission based on the configured periodicity of the SRS resources and then transmits the SRS in the active uplink BWP following this determined periodicity. This approach allows for dynamic adjustment of SRS transmission intervals, improving efficiency and adaptability in different network scenarios. The method ensures that SRS transmissions align with the active uplink BWP, optimizing resource usage and reducing unnecessary signaling overhead. By dynamically configuring SRS periodicity, the invention enhances uplink channel estimation and overall system performance.
12. User Equipment (UE), comprising: one or more processors; memory operatively coupled to the one or more processors, the memory storing one or more programs configured for execution by the one or more processors, the one or more programs comprising instructions for a method for Sounding Reference Signal (SRS) transmission, wherein the method comprising: receiving high-layer signaling, wherein the high-layer signaling is used for setting at least one SRS parameter configuration respectively for each of a plurality of uplink BWPs of the UE; determining an active uplink Bandwidth Part (BWP) among the plurality of uplink BWPs; determining an SRS parameter configuration corresponding to the active uplink BWP according to the high-layer signaling, wherein the SRS parameter configuration comprises a configuration of at least one SRS resource set in the active uplink BWP and a configuration of at least one SRS resource in the active uplink BWP; and transmitting an SRS in the active uplink BWP according to the SRS parameter configuration.
The invention relates to wireless communication systems, specifically to a method for Sounding Reference Signal (SRS) transmission in User Equipment (UE). The problem addressed is the efficient configuration and transmission of SRS across multiple uplink Bandwidth Parts (BWPs) in a flexible and dynamic manner. The UE includes one or more processors and memory storing programs for SRS transmission. The method involves receiving high-layer signaling that sets SRS parameter configurations for each of multiple uplink BWPs. The UE determines the currently active uplink BWP and retrieves the corresponding SRS parameter configuration from the high-layer signaling. This configuration includes details for at least one SRS resource set and at least one SRS resource within the active BWP. The UE then transmits the SRS in the active BWP according to the retrieved configuration. The solution enables dynamic adaptation of SRS transmission based on the active BWP, ensuring efficient use of resources and accurate channel state information for uplink communications. The high-layer signaling allows for flexible configuration of SRS parameters across different BWPs, supporting diverse network requirements and UE capabilities.
13. The UE of claim 12 , wherein the one or more programs comprises instructions for the method further comprising: determining the active uplink BWP according to BWP indication information, wherein latest received Downlink Control Information (DCI) for scheduling uplink transmission comprises the BWP indication information.
This invention relates to wireless communication systems, specifically to user equipment (UE) operations in managing uplink bandwidth parts (BWPs) in a cellular network. The problem addressed is the need for efficient and accurate determination of the active uplink BWP to ensure proper uplink transmission scheduling and resource allocation. The UE includes one or more programs with instructions for determining the active uplink BWP based on BWP indication information. This information is derived from the latest received Downlink Control Information (DCI) that schedules uplink transmission. The DCI contains explicit signaling to indicate the active uplink BWP, allowing the UE to dynamically adjust its transmission parameters accordingly. This mechanism ensures that the UE operates on the correct BWP, optimizing resource utilization and minimizing transmission errors. The solution involves processing the DCI to extract the BWP indication information and applying it to select the appropriate uplink BWP. This approach enhances flexibility in BWP management, particularly in scenarios where multiple BWPs are configured for different operational conditions. By relying on the latest DCI, the UE can promptly adapt to changes in network conditions or scheduling decisions, maintaining efficient communication with the base station. The invention improves the reliability and performance of uplink transmissions in wireless networks.
14. The UE of claim 12 , wherein the configuration of the at least one SRS resource set comprises at least one of a power control parameter configuration of the at least one SRS resource set, a usage configuration of the at least one SRS resource set, an aperiodic triggering state corresponding to the at least one SRS resource set, or a Channel State Information Reference Signal (CSI-RS) configuration associated with the at least one SRS resource set.
This invention relates to wireless communication systems, specifically to the configuration and management of Sounding Reference Signal (SRS) resource sets in a User Equipment (UE). The problem addressed is the need for flexible and efficient SRS resource set configurations to support various communication scenarios, such as beam management, channel state estimation, and uplink transmission optimization. The UE includes a transceiver and a processor configured to manage at least one SRS resource set. The configuration of these resource sets includes parameters such as power control settings, usage configurations, aperiodic triggering states, and Channel State Information Reference Signal (CSI-RS) associations. Power control parameters allow dynamic adjustment of SRS transmission power to optimize signal quality. Usage configurations define how the SRS resource sets are utilized, such as for beamforming or channel sounding. Aperiodic triggering states enable on-demand SRS transmissions, while CSI-RS configurations link SRS resources to specific downlink reference signals for improved channel reciprocity. The processor dynamically configures these parameters based on network conditions, UE capabilities, or specific use cases. For example, the UE may adjust power control settings to mitigate interference or optimize energy efficiency. The usage configuration may specify whether the SRS resource set is used for beam management or uplink channel estimation. Aperiodic triggering allows the network to request SRS transmissions when needed, reducing unnecessary overhead. The CSI-RS association ensures that SRS transmissions align with downlink measurements, improving overall system performance. This approach enhances flexibility and efficiency in SRS resource management, sup
15. The UE of claim 14 , wherein the one or more programs comprises instructions for the method further comprising: determining transmitted power for SRS transmission on the at least one SRS resource set according to a power control parameter configuration of the at least one SRS resource set; and transmitting the SRS in the active uplink BWP according to the determined transmitted power.
This invention relates to power control for Sounding Reference Signal (SRS) transmissions in a user equipment (UE) operating in a wireless communication system, particularly within an active uplink bandwidth part (BWP). The problem addressed is ensuring efficient and accurate SRS transmission power control to optimize uplink channel quality assessment and resource allocation by the network. The UE includes one or more programs with instructions for managing SRS transmission. The UE determines the transmitted power for SRS on at least one SRS resource set based on a power control parameter configuration specific to that resource set. This configuration may include parameters such as power control adjustments, reference signal power, or path loss compensation factors. After determining the appropriate power level, the UE transmits the SRS within the active uplink BWP according to the calculated power. This ensures that the SRS is transmitted with the correct power to facilitate accurate channel state information (CSI) feedback and uplink scheduling decisions by the network. The invention also involves selecting at least one SRS resource set from multiple available sets, where each set may have different configurations or purposes. The UE may activate or deactivate these resource sets dynamically based on network commands or operational conditions. The power control mechanism ensures that SRS transmissions are optimized for the current uplink BWP, improving overall system performance and reliability. This approach enhances the efficiency of uplink communications by aligning SRS power with the network's requirements for channel estimation and resource management.
16. The UE of claim 14 , wherein the one or more programs comprises instructions for the method further comprising: determining an antenna port, a transmission beam or an SRS resource number for SRS transmission on the at least one SRS resource set according to a usage configuration of the at least one SRS resource set, and transmitting the SRS in the active uplink BWP according to the determined antenna port, transmission beam or SRS resource number.
This invention relates to wireless communication systems, specifically to methods for configuring and transmitting sounding reference signals (SRS) in a user equipment (UE) operating in a 5G or New Radio (NR) network. The problem addressed is the efficient and flexible configuration of SRS resources to support various use cases, such as beam management, channel state information (CSI) acquisition, and uplink transmission scheduling. The UE includes one or more programs with instructions for managing SRS transmission. The UE determines an antenna port, transmission beam, or SRS resource number for SRS transmission on at least one SRS resource set based on a usage configuration of the SRS resource set. The usage configuration specifies how the SRS resource set is to be used, such as for beam management, CSI acquisition, or other purposes. The UE then transmits the SRS in the active uplink bandwidth part (BWP) according to the determined antenna port, transmission beam, or SRS resource number. This allows the network to dynamically adapt SRS configurations to different operational scenarios, improving efficiency and performance. The invention ensures that SRS transmissions are aligned with the current usage requirements, optimizing resource utilization and reducing signaling overhead. The UE's ability to dynamically select the appropriate antenna port, beam, or resource number based on the SRS resource set's usage configuration enhances flexibility in wireless communication systems.
17. The UE of claim 14 , wherein the one or more programs comprises instructions for the method further comprising: determining an SRS resource set for aperiodic SRS transmission in the active uplink BWP according to an aperiodic triggering state corresponding to the at least one SRS resource set and the aperiodic SRS triggering signaling, and transmitting the SRS in the active uplink BWP according to the determined SRS resource set.
A system and method for wireless communication involves a user equipment (UE) configured to manage aperiodic sounding reference signal (SRS) transmissions in an active uplink bandwidth part (BWP). The UE receives aperiodic SRS triggering signaling from a base station, which specifies an aperiodic triggering state associated with one or more SRS resource sets. The UE determines an appropriate SRS resource set for transmission based on the triggering state and the received signaling. The SRS is then transmitted in the active uplink BWP according to the selected resource set. This approach ensures efficient SRS transmission by dynamically selecting the correct resource configuration in response to network commands, optimizing uplink channel state feedback for adaptive modulation and scheduling decisions. The method supports flexible SRS resource allocation, allowing the network to request specific SRS configurations as needed, which improves spectral efficiency and reduces signaling overhead. The UE's ability to quickly adapt to aperiodic SRS requests enhances system performance in dynamic wireless environments.
18. The UE of claim 14 , wherein the one or more programs comprises instructions for the method further comprising: determining at least one of a beam or a precoding matrix for SRS transmission on the at least one SRS resource set according to a CSI-RS resource configuration associated with the at least one SRS resource set, and transmitting the SRS in the active uplink BWP according to the determined at least one of beam or precoding matrix.
This invention relates to wireless communication systems, specifically improving the efficiency of Sounding Reference Signal (SRS) transmission in a user equipment (UE) operating in an active uplink bandwidth part (BWP). The problem addressed is optimizing SRS transmission by dynamically selecting beams or precoding matrices based on channel state information reference signal (CSI-RS) configurations, ensuring better uplink channel estimation and resource utilization. The UE includes one or more programs with instructions for SRS transmission. The method involves determining at least one of a beam or a precoding matrix for SRS transmission on one or more SRS resource sets. This determination is based on a CSI-RS resource configuration associated with the SRS resource set. The UE then transmits the SRS in the active uplink BWP using the determined beam or precoding matrix. This approach allows the UE to adapt its SRS transmission parameters dynamically, improving the accuracy of uplink channel estimation and reducing interference in the network. The invention enhances the flexibility and efficiency of SRS transmission by leveraging CSI-RS configurations, which are typically used for downlink channel estimation, to optimize uplink transmissions. This method ensures that the SRS accurately reflects the current channel conditions, leading to better scheduling decisions by the base station and improved overall system performance. The solution is particularly relevant in advanced wireless systems where dynamic resource allocation and beamforming are critical for maintaining high data rates and low latency.
19. The UE of claim 12 , wherein the configuration of the at least one SRS resource comprises at least one of a time-frequency resource configuration of the at least one SRS resource, a sequence configuration of the at least one SRS resource, an antenna port configuration of the at least one SRS resource, a periodicity configuration of the at least one SRS resource, a spatial relation configuration of the at least one SRS resource, or an aperiodic triggering state corresponding to the at least one SRS resource.
This invention relates to wireless communication systems, specifically to the configuration and management of Sounding Reference Signal (SRS) resources in a user equipment (UE) device. The problem addressed is the need for flexible and efficient SRS resource configuration to support various communication scenarios, such as beam management, channel state information (CSI) acquisition, and uplink transmission optimization. The UE includes a processor configured to receive and process configuration parameters for at least one SRS resource. These parameters define the SRS resource's properties, including time-frequency resource allocation, sequence generation, antenna port mapping, transmission periodicity, spatial relation (e.g., beam direction), and aperiodic triggering conditions. The configuration allows the UE to adapt its SRS transmissions dynamically based on network requirements, such as adjusting beamforming, optimizing uplink synchronization, or supporting multi-antenna techniques. The time-frequency resource configuration specifies the subframes, slots, or symbols where the SRS is transmitted, along with the frequency bandwidth and subcarrier spacing. The sequence configuration defines the SRS signal's base sequence and cyclic shift, ensuring orthogonality with other UEs. The antenna port configuration assigns specific antenna ports for SRS transmission, enabling multi-antenna techniques like beamforming. The periodicity configuration sets how often the SRS is transmitted, while the spatial relation configuration links the SRS to a specific downlink reference signal (e.g., CSI-RS or SS/PBCH block) for beam alignment. The aperiodic triggering state allows the network to request SRS transmissions on-demand for specific purposes, such as channel estimation before
20. The UE of claim 19 , wherein the one or more programs comprises instructions for the method further comprising: determining a target SRS resource, a CSI-RS resource or a Synchronization Signal Block (SSB) spatially correlated with the at least one SRS resource according to a spatial relation parameter of the at least one SRS resource; determining a transmission beam of the at least one SRS resource according to the target SRS resource, the CSI-RS resource or the SSB; and transmitting the SRS in the active uplink BWP according to the determined transmission beam.
A wireless communication system involves user equipment (UE) transmitting sounding reference signals (SRS) in an active uplink bandwidth part (BWP) of a cell. The challenge is efficiently determining the appropriate transmission beam for SRS to ensure accurate channel state information (CSI) and synchronization. The invention addresses this by enabling the UE to determine a target SRS resource, a channel state information reference signal (CSI-RS) resource, or a synchronization signal block (SSB) that is spatially correlated with the SRS resource based on a spatial relation parameter. The UE then determines the transmission beam for the SRS resource using the identified target SRS, CSI-RS, or SSB. Finally, the UE transmits the SRS in the active uplink BWP using the determined beam. This method ensures proper beam alignment and signal quality by leveraging spatial correlation between reference signals and SRS, improving communication reliability in dynamic wireless environments. The solution is particularly useful in scenarios where beam management is critical, such as millimeter-wave communications or high-mobility scenarios.
21. The UE of claim 19 , wherein the one or more programs comprises instructions for the method further comprising: determining an SRS sequence for SRS transmission on the at least one SRS resource according to the sequence configuration of the at least one SRS resource, and transmitting the SRS in the active uplink BWP according to the determined SRS sequence.
This invention relates to wireless communication systems, specifically to methods for configuring and transmitting sounding reference signals (SRS) in a user equipment (UE) operating in a 5G or similar cellular network. The problem addressed is the efficient and flexible transmission of SRS in different uplink bandwidth parts (BWPs) to support channel state information (CSI) estimation and beam management. The UE includes one or more programs with instructions for managing SRS transmission. The UE receives a configuration for at least one SRS resource, including parameters such as frequency-domain positions, time-domain positions, and sequence configurations. The UE determines an SRS sequence for transmission based on the sequence configuration of the SRS resource. The SRS is then transmitted in the active uplink BWP according to the determined sequence. This ensures proper synchronization and channel estimation at the base station. The configuration may include multiple SRS resources, each with distinct parameters, allowing the UE to adapt its SRS transmission to varying network conditions. The sequence configuration defines how the SRS sequence is generated, ensuring compatibility with the base station's expectations. The UE dynamically adjusts its SRS transmission based on the active uplink BWP, optimizing resource usage and maintaining communication efficiency. This method supports flexible SRS deployment in modern wireless networks, improving reliability and performance.
22. The UE of claim 19 , wherein the one or more programs comprises instructions for the method further comprising: determining a periodicity operation for SRS transmission on the at least one SRS resource according to the periodicity configuration of the at least one SRS resource, and transmitting the SRS in the active uplink BWP according to the determined periodicity operation.
This invention relates to wireless communication systems, specifically to methods for configuring and transmitting Sounding Reference Signals (SRS) in a User Equipment (UE) operating in a 5G New Radio (NR) network. The problem addressed is the efficient management of SRS transmissions in active uplink Bandwidth Parts (BWPs) to optimize resource utilization and reduce signaling overhead while maintaining accurate channel state information for uplink scheduling. The UE is configured with one or more SRS resources, each having a periodicity configuration. The UE determines a periodicity operation for SRS transmission on these resources based on their configured periodicity. The SRS is then transmitted in the active uplink BWP according to the determined periodicity. This ensures that SRS transmissions align with the configured periodicity, avoiding unnecessary transmissions and conserving uplink resources. The method also supports dynamic adjustments to SRS configurations, allowing the network to adapt to changing channel conditions or traffic demands without frequent reconfigurations. The invention improves SRS transmission efficiency by dynamically adapting to the active uplink BWP and configured periodicity, reducing signaling overhead and enhancing uplink resource management. This is particularly useful in scenarios where multiple SRS resources are configured, and the UE needs to prioritize transmissions based on network requirements. The solution ensures that SRS transmissions are timely and accurate, supporting reliable uplink scheduling and link adaptation.
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September 15, 2020
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